CN101794542A - Video display apparatus - Google Patents
Video display apparatus Download PDFInfo
- Publication number
- CN101794542A CN101794542A CN200910225225A CN200910225225A CN101794542A CN 101794542 A CN101794542 A CN 101794542A CN 200910225225 A CN200910225225 A CN 200910225225A CN 200910225225 A CN200910225225 A CN 200910225225A CN 101794542 A CN101794542 A CN 101794542A
- Authority
- CN
- China
- Prior art keywords
- backlight
- brightness
- zone
- value
- display device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims abstract description 6
- 238000012937 correction Methods 0.000 claims description 18
- 230000033228 biological regulation Effects 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 230000001678 irradiating effect Effects 0.000 abstract 1
- 239000004973 liquid crystal related substance Substances 0.000 description 42
- 238000009826 distribution Methods 0.000 description 27
- 241000276489 Merlangius merlangus Species 0.000 description 20
- 238000010586 diagram Methods 0.000 description 16
- 238000000034 method Methods 0.000 description 10
- 230000009471 action Effects 0.000 description 9
- 230000003287 optical effect Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000008595 infiltration Effects 0.000 description 3
- 238000001764 infiltration Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000011835 investigation Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000003702 image correction Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T5/00—Image enhancement or restoration
- G06T5/40—Image enhancement or restoration using histogram techniques
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T5/00—Image enhancement or restoration
- G06T5/90—Dynamic range modification of images or parts thereof
- G06T5/94—Dynamic range modification of images or parts thereof based on local image properties, e.g. for local contrast enhancement
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
- G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
- G09G3/3426—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines the different display panel areas being distributed in two dimensions, e.g. matrix
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/20—Special algorithmic details
- G06T2207/20004—Adaptive image processing
- G06T2207/20012—Locally adaptive
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
- G09G2320/0646—Modulation of illumination source brightness and image signal correlated to each other
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Transforming Electric Information Into Light Information (AREA)
- Liquid Crystal (AREA)
Abstract
For the purpose of obtaining a video signal by suppressing a black float while not consuming an excess electric power therein, not contributing to display of a backlight, a video display apparatus having a plural number of backlights for irradiating lights upon a display panel, comprises a histogram detector for conducting a histogram detection for each display region corresponding to that backlight from an input video signal of one (1) frame, a means for determining a control value of that plural number of backlights depending on a specific picture or video, which is detected by the histogram detector, and a video signal processor for controlling an amount of a controlled light the display panel of a display region, i.e., a put-out region, depending on the backlight control value, which is determined by the means for determining the control value of the backlight.
Description
Technical field
The present invention relates to carry out the image display device that image shows by backlight being modulated according to picture signal, particularly relate to image display area is divided into a plurality of zones, lighting device that the lightness of the backlight in the zone corresponding with picture signal is controlled and image display device and the method for displaying image that possesses it.
Background technology
Cathode-ray tube (CRT)), the display device of the light emitting-type of plasma display etc., and the display device of the non-light emitting-type of LCD (being also referred to as liquid crystal indicator, display panels) etc. display device can be divided into CRT (Cathode Ray Tube: substantially.
As the display device of non-light emitting-type, have use regulate according to picture signal the reflection of light light quantity reflection-type optical modulation element device and use the device of optical modulation element of adjusting the infiltration type that sees through light quantity of light according to picture signal.Particularly, optical modulation element as infiltration type uses display panels, and possess the liquid crystal indicator of lighting device (being also referred to as backlight) at its back side, because slim light weight, so be used as various display device such as the monitor of computing machine, televisors.
But, in the display device of the emissive type that CRT is such, when display image, make specific pixel optionally luminous with the light quantity of necessity according to picture signal.Therefore, can stop the luminous of picture under the situation of the image that show when deceiving, demonstration is darker, perhaps reduce luminous quantity, reduce so consume electric power.
Relative therewith, in the display device of the so non-light emitting-type of liquid crystal indicator, irrelevant usually with picture signal, make backlight always luminous with constant lightness.Thereby, the lightness (also claiming brightness) that the lightness of backlight meets picture usually becomes maximum condition, even also luminous under the situation of deceiving the darker image of demonstration or demonstration, so can consume for showing useless unnecessary electric power with same lightness.And when black the demonstration, the part of the light of backlight is leaked, and deepening fully is so the contrast in the darkroom is littler than the display device of the emissive type of CRT etc.
Therefore, develop various by in liquid crystal indicator, image display area being divided into a plurality of zones, at the brightness of the backlight in each cut zone unit control zone corresponding, realize the liquid crystal indicator of high-contrast and saving electric power thus with picture signal.
But, under the situation of the controlling value of the picture signal regional decision backlight according to each, when in the same area, being transfused to the image that has white image and picture black, light according to the mode that this regional backlight controlling value becomes high-high brightness, so the part of picture black produces factitious whiting.Particularly, under the situation of backlight, because the contrast of liquid crystal panel is not an infinity, so the problem that exists factitious whiting to be identified significantly with the zone of lit at maximum brightness and the zone adjacency of not lighting.
For above-mentioned problem, proposed to suppress the liquid crystal indicator of whiting so far by the lightness of control backlight.In the past, as this technology, the content of being put down in writing in the patent documentation 1 was for example arranged.The liquid crystal indicator of record in patent documentation 1, shown in Figure 12 (b), for with the neighboring region (Figure 12 c) of the certain width of non-some bright area of the cut zone adjacency of being lighted based on picture signal, by to light backlight, whiting (Figure 12 Ab) is not identified than the little brightness of brightness of the cut zone of being lighted.
Patent documentation 1: TOHKEMY 2008-51905 communique
Summary of the invention
But, in the above-mentioned existing liquid crystal indicator, have following problem.
For for the neighboring region of the certain width of non-some bright area of the cut zone adjacency of being lighted based on picture signal, light backlight so that its become can not be identified and the brightness of the luminance difference of some bright area, so can consume morely for showing useless unnecessary electric power.In addition, about from the light leak not record of a bright area, in control, do not consider to non-some bright area.
The present invention finishes in view of above-mentioned problem.And the invention provides a kind of technology that can suppress the unnecessary electric power of backlight, inhibition whiting simultaneously.
Image display device of the present invention is characterized in that: extinguish by making from the brightness of the above-mentioned backlight in the zone of light leak amount more than setting of a bright area, the photocontrol amount of control display panel suppresses whiting thus.As display panel, under the situation of using infiltration type display panels such as display panels, as photocontrol amount control transmitance.
In addition, the invention is characterized in: analyze received image signal, go out the specific image of needs control whiting, and obtain the positional information of a bright area according to its feature detection.By considering from the light leak of a bright area with to the distance of putting bright area, the transmitance that concerns the display panel of control and some bright area adjacency and the non-some bright area (correcting area) in certain distance based on position with a bright area, reduce whiting, unnecessary backlight electric power is suppressed at Min..
According to this structure, image display area is being divided into a plurality of zones, control the zone corresponding with picture signal backlight brightness lighting device and possess in its image display device, by the photocontrol amount of control, can access and save the image that the electric power effect is big, suppress whiting with non-some bright area corresponding display panel.
According to the present invention, can access and save the image that the electric power effect is big, suppress whiting.
Description of drawings
Fig. 1 is the synoptic diagram of integral body of the present invention.
Fig. 2 is an entire block diagram of the present invention.
Fig. 3 is the block diagram of the action of the picture signal handling part in the key diagram 2.
Fig. 4 is according to histogrammic specific image detection figure.
Fig. 5 is the block diagram of the action of the picture signal correction unit in the key diagram 2.
Fig. 6 is the synoptic diagram of investigation from the influence of the light leak of neighboring region.
Fig. 7 is the luminous intensity distribution contribution rate of expression specific region.
Fig. 8 is the block diagram of the action of the storage area portion in the key diagram 5.
Fig. 9 is the figure of the controlled filter device of expression embodiment 2.
Figure 10 is the block diagram of action of the picture signal correction unit of explanation embodiment 2.
Figure 11 is the entire block diagram of embodiment 3.
Figure 12 is whiting control concept figure of the prior art.
Symbol description
101 viewing areas
102 backlight region that can independently control
201 picture frame acceptance divisions
202 picture signal handling parts
203 backlight control parts
204 picture signal correction units
205 backlight driver portions
206 liquid crystal control parts
207 H-drivers
208 V-drivers
209 liquid crystal panels
210 backlight units
The histogram test section in 301 every zones
302 controlled filter devices
303 control signal 3ON portions
304 control signal 3OFF portions
305 backlight controlling value determination sections (control signal 3ON)
306 backlight controlling value determination sections (control signal 3OFF)
307 back light source brightness distribution generating units
308 storage area portions
501 judging parts 1
502 judging parts 2
503 judging parts 3
504 picture signal configuration parts
505 picture signal correction units based on the back light source brightness distribution
506 picture signal correction units based on the back light source brightness distribution
507 coefficient operational parts
508 storage area portions
1001 judging parts 4
1002 judging parts 5
Coefficient operational part in 1003 area I
Coefficient operational part among the 1004 regional J
The 1005 storage area portions corresponding with area I
The 1006 storage area portions corresponding with regional J
1101 picture signal handling parts
1102 dynamic image detecting units
Embodiment
Embodiments of the present invention below are described.
[embodiment 1]
Fig. 1 is the synoptic diagram of the transmitance variation of (a) received image signal of liquid crystal indicator of the expression first embodiment of the present invention and (b) backlight controlling value when having imported received image signal, distributions of (c) back light source brightness, (d) target brightness distribution, (e) liquid crystal panel.As an example, above-mentioned received image signal is made of picture black (being 0 at 8bit for example) zone and white image (255) zone, and the zone (102) of the backlight that can control independently when viewing area (101) are divided into a plurality of zone amounts to 30 zones by 6 zones of transverse direction, 5 zones of longitudinal direction and constitutes.In each zone, be provided with one or more and can control light source its light quantity (brightness), for example light emitting diode etc. respectively.By controlling corresponding light source in each zone, control the brightness of each regional backlight respectively with this.Below also each zone is called " backlight region ".
Above-mentioned backlight controlling value, be corresponding with above-mentioned received image signal, backlight controlling value decision that will be corresponding with the zone that is transfused to white image (also claim some a bright area) is for this zone becomes the controlling value (being 255 at 8bit for example) of high-high brightness, makes with the regional of this bright area adjacency and is that the backlight controlling value in the zone more than the setting is 0 from the light leak amount of a bright area.To be that regional corresponding backlight controlling value below the setting, that be transfused to picture black is controlled from a bright area extractor gauge set a distance and from the light leak amount of a bright area, make the transmitance of above-mentioned target brightness distribution by changing above-mentioned liquid crystal panel in the scope that can show, carry out luminous with abundant little value (is 1 at 8bit) with respect to the zone that is transfused to white image.
In the structure of general liquid crystal indicator, between backlight unit and liquid crystal panel portion, add several pieces of optical sheet classes such as diffuser plate, luminous from a bright area distributes with comparing biglyyer corresponding to the viewing area of this regional liquid crystal panel.Thus, with non-some bright area of a bright area adjacency, also can produce the light leak of invading from the light of a bright area.Herein, so-called light leak amount when referring to the transmitance maximum that makes liquid crystal panel, from the light quantity that a bright area is leaked non-some bright area, is meant the value with definition such as front face brightness.
At this moment, from the setting of the light leak amount of above-mentioned some bright area, the brightness more than 1% that preferably in non-some bright area, has a bright area high-high brightness.
Above-mentioned target brightness distribution, with at above-mentioned some bright area certain distance of distance with interior for to be equal to the brightness value that maybe can not discern luminance difference with whiting, above-mentioned brightness is set to the mode of 0 variation lentamente after certain distance.
By accepting above-mentioned backlight controlling value, shown in the transmitance variation of above-mentioned liquid crystal panel, picture signal is proofreaied and correct so that become above-mentioned target brightness distribution, can access nonrecognition and go out whiting, save the high image of electric power effect.
Below utilize accompanying drawing to describe embodiments of the invention in detail.
Fig. 2 is the loop block diagram of the integral body in the liquid crystal indicator of the first embodiment of the present invention.
The liquid crystal indicator that this is routine, as shown in the drawing, constitute by picture frame acceptance division (201), image processing part (202), backlight control part (203), picture signal correction unit (204), backlight driver portion (205), liquid crystal control part (206), H-driver (207), V-driver (208), liquid crystal panel (209) and backlight unit (210).
Fig. 3 is the block diagram of the action of the above-mentioned picture signal handling part of explanation.
The picture frame that above-mentioned picture frame acceptance division is received is sent to above-mentioned picture signal handling part.To importing the above-mentioned picture frame of this picture signal handling part, carry out histogram by each regional histogram test section (301) at each of a plurality of backlight region that can independently control and detect.In this histogram detects, gray-level value counting to each pixel of the picture frame that comprises in this backlight region, gray-level value more than the lower limit gray-level value (P2) of gray-level value below the set upper limit gray-level value (P1) and regulation accounts under the situation more than 90% of the pixel count corresponding with this backlight region, makes control signal 1 be ON.In addition, the gray-level value that comprises in this backlight region the gray-level value below the P1 and the gray-level value more than the P2 account for the pixel count corresponding with this backlight region more than 90% and comprise under the situation of the gray-level value more than the P2, make control signal 2 be ON.
For example, 0% to 10% the value of maximum gray-level value (if 8bit then be 255) of setting P1 and be pixel is as 20, and P2 is that 85% to 100% value of maximum gray-level value is as 220.
Example explanation with Fig. 4, (a) received image signal and (b) the backlight position be under the situation of the relation shown in the figure, the histogram that the regional A1 of picture black is only arranged, only comprise the gray-level value that P1 is following, do not comprise the gray-level value that P2 is above, institute makes control signal 2 be OFF so that control signal 1 is ON.The regional A4 that comprises white image only comprises gray-level value and the above gray-level value of P2 that P1 is following, and comprises the gray-level value that P2 is above, and institute makes control signal 2 be ON so that control signal 1 is ON.Relative therewith, half of zone comprises the regional A6 of middle gray grade image, do not satisfy this condition more than 90% that following gray-level value of P1 and the above gray-level value of P2 account for the pixel count corresponding with above-mentioned backlight region, make control signal 1 be OFF, make control signal 2 be OFF.
Detect by above-mentioned histogram, can determine to be easy to produce the picture frame of whiting.In this histogram detects, detect the counter of middle gray grade point at each above-mentioned zone in the above-mentioned picture frame, if the control signal 1,2 that count down to more than 10% the pixel count in this zone then should the zone all is OFF, even do not go out the gray-level value more than the P2 then control signal 2 that should the zone is ON if the middle gray grade point is counted more than 10% the pixel count in this zone 1 pixel detection, therefore the gray-level value counting in the histogram is less, has the advantage that can excessively not increase the loop scale of hardware.
After the histogram detection end for all above-mentioned backlight region, in controlled filter device (302), decision is to the control method of above-mentioned picture frame.
Only the control signal 1 in all above-mentioned backlight region is under the situation of ON, makes control signal 3 be ON (303), and the controlling value of backlight region determines (305) based on control signal 2 for the positional information in the zone of ON.
The determining method of the backlight controlling value when below narration control signal 3 is ON.
Fig. 6 is that expression be the synoptic diagram of diffusion of the light of center consideration with zone C 3.When only zone C 3 is luminous, the Luminance Distribution the when transmitance of liquid crystal panel is set at maximum, the x direction of principal axis in (a), the y direction of principal axis represents that in (b) Luminance Distribution with solid line description region C3 dots the luminous of neighboring region.As shown in FIG., the luminous of zone C 3 impacts neighboring region, and in addition, zone C 3 also is subjected to the influence from the light leak of neighboring region.Particularly, in input zone C 3 is set under the situation of picture signal of high-high brightness, zone C 3 and the neighboring region that zone C 3 is impacted also must be luminous with high-high brightness.Usually, the backlight region of adjacency is interrelated like this, according to this interrelated decision backlight controlling value, generates Luminance Distribution.When generating Luminance Distribution, do not consider under the situation from the light leak of neighboring region the known image that can produce the image breakage or can not obtain the high definition of faithful to original image.
Schematically show the brightness contribution rate of zone C 3 among Fig. 7 by each zone.Shown in (a), the luminous ratio that accounts for of zone C 3 self is 75% in the zone C 3, and residue 25% is filled up by the light leak from neighboring region.That is, under the situation of only luminous and luminance shortage, make the backlight controlling value of neighboring region become certain multiple etc., fill up not enough brightness by zone C 3.
But the non-zone of lighting that makes and put the bright area adjacency is lighted and is filled up under the situation of brightness, can consume the more unnecessary electric power that is helpless to show.
Therefore, in the present embodiment, be the picture frame of ON for above-mentioned control signal 3, shown in Fig. 7 (b), the luminous of neighboring region is set at 0 to the contribution rate of lighting area contribution, make control signal 2 luminous with high-high brightness for the zone of ON.Control signal 2 is the backlight controlling value in the zone of OFF, is to make and put the zone of bright area adjacency and is that the backlight controlling value in the zone more than the setting is 0 from the light leak amount of a bright area.In the range points bright area predetermined distance and from the light leak amount of a bright area be below the setting, control signal 2 is the backlight controlling value in the zone of OFF, being according to making above-mentioned target brightness distribution in the scope that can show by the transmitance that changes above-mentioned liquid crystal panel, is that the zone of ON determines the backlight controlling value in the abundant little luminous mode of value (is 1 at 8bit) with respect to control signal 2.
And, it is the unit that calculates above-mentioned light leak amount, light leak amount under the situation that single area is lighted is stored in the storage area portion (308) etc., by according to from a bright area until specific locations of pixels information, obtain the value that determines from the summation of the light leak amount of all some bright area.Calculate the unit of above-mentioned light leak amount, can be assembled in the controlling value decision unit of backlight, also can realize with outside microprocessor, hardware.In addition, also can light the light leak amount of zone when lighting to calculate and be stored in ROM etc. in advance be in the storage area of representative, as LUT (LOOK UP TABLE: look-up table) carry out reference specific.
Controlling value by such setting backlight, the display brightness that only has the picture frame of the above gray-level value of the lower limit gray-level value (P2) of regulation descends, but can suppress to be helpless to show luminous, suppress whiting, can improve electric power simultaneously and cut down effect.In addition, because Luminance Distribution is to generate in backlight controlling value decision back, so can not produce image breakage etc.
The control signal 1 of above-mentioned backlight region makes control signal 3 be OFF (304) for the zone of OFF is included under the situation in the picture frame, and the controlling value of backlight region is based on received image signal decision (306).
After the controlling value that has determined above-mentioned backlight region, in back light source brightness distribution generating unit (307), generating the back light source brightness corresponding with this controlling value distributes, the controlling value of backlight region is sent to backlight control part (203), and the back light source brightness that is generated is distributed sends to picture signal correction unit (204).
Storage area portion (308) is made of the memory element that with ROM, RAM etc. is representative, the backlight controlling values of the amount of the characteristic of the light of preservation backlight, number frame etc. are the parts of information necessary in the decision that stores above-mentioned backlight controlling value, the above-mentioned back light source brightness distribution generating unit.
Then, utilize Fig. 5 that image correction unit in the above-mentioned picture signal correction unit is described.
Above-mentioned picture signal correction unit is transfused to picture frame, control signal 3, back light source brightness distribution and each regional control signal 2 from above-mentioned picture signal handling part, at first in judging part 1 (501), judges that control signal 3 is ON or OFF.Control signal 3 is under the situation of ON, advances to judging part 2 (502), judges that the control signal 2 of correcting area is ON or OFF.The control signal 2 of this correcting area is under the situation of OFF, advances to judging part 3 (503), and whether the range points bright area is in predetermined distance to judge this correcting area.This judging part 3 has following effect: the transmitance control of carrying out liquid crystal panel makes near the zone whiting a bright area not be identified and not control to reduce this regional brightness in the zone of abundant point of distance bright area.This predetermined distance is the value that can set arbitrarily, and expression becomes the region quantity in 0 zone from a bright area to target brightness distribution, be 3 under the situation of Fig. 1.
This correcting area range points bright area be predetermined distance with interior situation under, in picture signal configuration part (504), set picture signal.The picture signal of setting in this picture signal configuration part is given arbitrary value in constant mode in the zone, based on back light source brightness distribution image signal correction (505).
Picture signal, for certain pixel (u, v), the display brightness of establishing liquid crystal panel is D (u, v), the Luminance Distribution that generates by above-mentioned back light source brightness distribution generating unit be BL (u, v), the pixel grey scale grade point after the correction is P1 (u, v), the gamma characteristic of liquid crystal panel is γ, then has following relation:
D(u，v)＝γ(P1(u，v))×BL(u，v)
For in above-mentioned picture signal configuration part, set, in the zone, be constant brightness value D (u, v), the pixel grey scale grade point P1 after the correction (u v) is:
P1(u，v)＝γ-1(D(u，v)÷BL(u，v))
P (the u that tries to achieve by this relation, v), it is the value that backlight luminous becomes uniform brightness value when seeing through liquid crystal panel, from storage area portion (508) read be sent to coefficient operational part (507), based on set with the position of bright area relation, for the coefficient value of each pixel, by computing decision send to above-mentioned liquid crystal control part pixel grey scale grade point P2 (u, v).
Below narrate the read method of the coefficient value in the above-mentioned coefficient operational part.
If the position of this correcting area be (Xi, Yi), the position of this bright area be (Xj, Yj), the difference of the x direction of some bright area and correcting area be s (=Xi-Xj), the difference of y direction be t (=Yi-Yj).In above-mentioned coefficient operational part, investigation is put the difference of bright area with all, the positional information of the aggregate value minimum of the absolute value of calculating s and t.Exist under the situation of the identical some bright area of the aggregate value of absolute value of a plurality of s and t, only store absolute value.Based on the positional information of this bright area, call the coefficient value k that stores in the above-mentioned storage area portion (u, v), by computing following formula decision picture signal:
P2(u，v)＝P1(u，v)×k(u，v)
As an example, with the information representation of the coefficient value stored in the above-mentioned storage area portion at Fig. 8.The coefficient value of this storage area portion storage all have with from the corresponding coefficient value of the light leak of neighboring region, have absolute value, store the brightness settings that sees through above-mentioned liquid crystal panel for being equal to or can not discerning the coefficient value (A) of luminance difference with whiting or being set at the Table1 of the coefficient value (C) that above-mentioned brightness slowly uses to 0 coefficient value (B) that changes or all black picture at each s, t; The Table2 of the coefficient value under the situation of the some bright area identical with the aggregate value that stores the absolute value that has a plurality of s and t.
In the example of Fig. 8, Table1 is under the situation below 2 above-mentioned correcting area to be set at and the coefficient value (A) that whitens and be equal to or can not discern luminance difference at absolute value, and absolute value is under the situation 3 or more above-mentioned correcting area to be set at the coefficient value (C) that above-mentioned brightness is slowly used to the coefficient value (B) or all black picture of 0 variation.
For example, under the situation of s=1, t=1, in above-mentioned coefficient operational part, call the coefficient value of the numbering A1 of above-mentioned storage area portion storage,, obtain the picture signal of correcting area by computing.In addition, under the situation of s=-2, t=-1, call the coefficient value of the numbering B2-1 of above-mentioned storage area portion storage, after upset up and down,, obtain the picture signal of correcting area by computing.Exist under the situation of the identical some bright area of the aggregate value of absolute value of a plurality of s and t, call and the corresponding coefficient value of the value of absolute value, by computing, the picture signal of decision correcting area.
In above-mentioned judging part 1, judging part 2, judging part 3, with the picture signal of the inconsistent above-mentioned correcting area of condition with generated the picture signal of the correcting area of picture signal by above-mentioned picture signal generating unit, distribution is carried out picture signal and proofreaies and correct (506) based on back light source brightness, and sends to liquid crystal control part (206).
In the above-mentioned liquid crystal control part,, generate control signal, send to H-driver 1 (207), V-driver (208) based on the image synchronizing signal that is transfused to.In the H-driver, generate shows signal based on the picture signal that is sent out from above-mentioned picture signal correction unit, and send to liquid crystal panel (209).In the V-driver, generate sweep signal, and send to liquid crystal panel.In liquid crystal panel, by driving each scan electrode and each data electrode, the pixel region of correspondence is applied the grayscale voltage corresponding with shows signal, control the response of the liquid crystal in this pixel region.
In addition, pass on the method for conveying of each regional backlight controlling value to above-mentioned backlight control part from above-mentioned picture signal handling part, if comprise the signal that is used to specify this regional signal and is used to specify luminous intensity, then can use special-purpose bus, use the method for abideing by the various interface specification, in the interregnum of picture signal, insert etc., do not specify.In the above-mentioned backlight control part, will the control signal corresponding send to above-mentioned backlight driver portion with the luminous intensity of each backlight unit (210).In this backlight driver portion, drive the signal of backlight, be PWM (pulse-length modulation) or Modulation and Amplitude Modulation.Under the situation of PWM, make the PWM frequency constant, according to luminous intensity change during the ON with OFF during ratio (dutycycle), the led driver that is used for driving LED is carried out PWM control.In addition, preferably the frame rate than liquid crystal indicator is higher for the PWM frequency.
[embodiment 2]
The second embodiment of the present invention, for the Luminance Distribution in the maintenance face is constant, not according to the positional information of a bright area, but the picture signal of correcting area being set by each specific region decision.Among second embodiment, the determining method (305) of the action of controlled filter device (302), the backlight controlling value when control signal 3 is ON is different with embodiment 1 with the action of picture signal correction unit (205).
Fig. 9 is the figure that viewing area (101) is categorized as 3 kinds of zones of the second embodiment of the present invention.
Above-mentioned controlled filter device is accepted each regional control signal 1 and control signal 2 from the histogram test section (301) in every zone, control signal 1 in All Ranges all is ON and control signal 2 for the zone of ON only is included under the situation in the area I, makes control signal 3 be ON.
About the backlight controlling value of the control signal that comprises among area I and the regional J 2, make and put the zone of bright area adjacency and be 0 from the backlight controlling value in the zone of light leak amount more than setting of a bright area for the zone of OFF.With range points bright area predetermined distance, from the light leak amount of a bright area below setting, control signal 2 is the backlight controlling value in the zone of OFF, be decided to be make the transmitance of above-mentioned target brightness distribution by changing above-mentioned liquid crystal panel in the scope that can show, with respect to control signal 2 for the zone of ON with the abundant little luminous backlight controlling value of value (is 1 at 8bit).Making the control signal 2 that is included among the regional K is 0 to extinguish for the backlight controlling value in the zone of OFF.
In addition, for control signal 2 in the zone of OFF, be included in the above-mentioned correcting area in the area I, read the coefficient value that is set at and whitens and be equal to or can not discern luminance difference from storage area portion (1005), by in coefficient operational part (1003), carrying out computing decision picture signal.For this correcting area that is included in the regional J, from storage area portion (1006) read corresponding with the positional information of this correcting area, be set at above-mentioned brightness slowly to 0 coefficient value that changes, by in coefficient operational part (1004), carrying out computing decision picture signal.Do not carry out image rectification (1001) for this correcting area that is included in the regional K.
By carrying out above-mentioned action, irrelevant and become Luminance Distribution in the constant face with the positional information of a bright area, show the not image of identified whiting.
In addition, the determining method of the region quantity of area I, regional J, regional K, the acquisition mode of region shape are not certain, can be methods in addition shown in Figure 9 yet.Not needing area I, regional J, regional K are all comprised, also can be the combination that regional J and regional K is only arranged or area I and regional J are only arranged.
[embodiment 3]
Figure 11 is the loop block diagram of the integral body in the liquid crystal indicator of the third embodiment of the present invention.
The liquid crystal indicator that this is routine, as shown in the drawing, in embodiment 2, added dynamic image detecting unit (1102).This dynamic image detecting unit has the dynamic image detecting unit with the motion vector representative for received image signal, and its output is sent to picture signal handling part (1101), and this picture signal handling part is exported modification control method with this.Wherein, as shown in the drawing, the dynamic image detecting unit not necessarily will also can be included in the graphics processing unit in the outside of image signal processing unit.
Detected by above-mentioned dynamic image detecting unit under the situation of dynamic image, the action of controlled filter device (302) is different with embodiment 2.Above-mentioned controlled filter device is according to area I, regional J, regional K among direction of motion change Fig. 9 of received image signal.
For example, input is under the situation of image representative, that white text slowly moves to the picture upper end from the picture lower end with lower the curtain (the end roll) of film, in several above-mentioned correcting areas, be equal to the picture signal that the coefficient value that maybe can not discern luminance difference carries out computing with being set at whitening, with be set at above-mentioned brightness and slowly occur repeatedly to the picture signal that 0 coefficient value that changes carries out computing, output image may show inharmonious sense.Therefore, detect with above-mentioned dynamic image detecting unit under the situation of the above-mentioned image of input, by the area I shown in change Fig. 9 (b), the acquisition mode of regional J, regional K, above-mentioned correcting area always is set to be equal to the picture signal that the mode that maybe can not discern luminance difference is set with whiting, can show with the positional information of some bright area irrelevant and be in the constant face Luminance Distribution, the image of identified whiting not.
In addition, in the explanation of above-mentioned embodiment, the example as light source with LED has been described, but also can have used light source in addition, for example laser diode, cold cathode/thermic cathode fluorimetric pipe (CCFL, EEFL, HCFL).
Utilize possibility on the industry
The present invention can be applied to backlight is divided into the liquid crystal indicator that a plurality of zones also can be controlled respectively, for example LCD TV machine, portable display apparatus.
Claims (12)
1. image display device, it has display panel and is divided into backlight to a plurality of zones of this display panel irradiates light, can be by the brightness of each control backlight in these a plurality of zones, this image display device is characterised in that, comprising:
The histogram test section, its received image signal according to 1 frame carries out the histogram detection by each and this backlight corresponding display;
Light leak amount operational part, it is lighted hourglass to certain described zone and carries out computing to the light leak amount in certain different zone, zone with this;
Control part, it determines the controlling value of described backlight according to described detected histogram and described light leak amount; With
The picture signal correction unit, it adjusts the photocontrol amount of described display panel according to the backlight controlling value of described control part decision.
2. image display device as claimed in claim 1 is characterized in that, comprising:
Judging part, it judges according to described detected histogram whether input picture is specific image,
Described light leak amount operational part carries out computing to leaking to the light leak amount in the zone different with described certain zone under the situation that the described specific image signal of described judgement section judges has been transfused to.
3. image display device as claimed in claim 2 is characterized in that:
Described judging part, under the situation about constituting more than 90% by the pixel count in the zone, the judgement received image signal is a specific image to gray-level value more than the lower limit gray-level value (P2) of gray-level value in described detected histogram below the set upper limit gray-level value (P1) and regulation in All Ranges.
4. image display device as claimed in claim 2 is characterized in that:
Described set upper limit gray-level value (P1) is 0%～10% a value of the maximum gray-level value of pixel, and the lower limit gray-level value (P2) of described regulation is 85%～100% a value of maximum gray-level value.
5. image display device as claimed in claim 2 is characterized in that:
Under the situation that described specific image signal has been transfused to,
Described control part is controlled, and extinguishing the brightness of described backlight in the zone of described light leak amount more than the value of regulation, and lights the brightness of the described backlight in the zone of described light leak amount below the value of regulation with the brightness lower than the brightness of a bright area.
6. image display device as claimed in claim 1 is characterized in that:
Under the situation that described specific image signal has been transfused to,
Described control part is controlled, extinguishing or to light the brightness of described backlight in the zone of described light leak amount more than the value of regulation, and the brightness of brightness and the light source of some bright area of the described backlight in the zone of described light leak amount below the value of regulation is in a ratio of below 1/100 with the brightness below 1/100 of lighting brightness.
7. image display device as claimed in claim 5 is characterized in that:
The setting of described light leak amount has the brightness more than 1% of the high-high brightness of described some bright area.
8. image display device as claimed in claim 1 is characterized in that:
Under the situation that described specific image signal has been transfused to,
Described control part is controlled, and makes the brightness of described backlight in zone of the above gray-level value of the lower limit gray-level value (P2) that comprises described regulation luminous with high-high brightness.
9. image display device as claimed in claim 1 is characterized in that:
Described picture signal correction unit pair is proofreaied and correct with the photocontrol amount of the described non-viewing area corresponding display panel of lighting according to the positional information of described some bright area.
10. image display device as claimed in claim 1 is characterized in that:
Described picture signal correction unit is proofreaied and correct the photocontrol amount of the described display panel corresponding with described non-viewing area of lighting under the some bright area of described specific image is included in situation in the specific region, makes that brightness is certain in the face.
11. image display device as claimed in claim 1 is characterized in that:
The live image test section that also comprises the direction of motion that is used for the detected activity image,
According to the moving direction of the detected described specific image of this live image test section, the photocontrol amount of the described picture signal correction unit pair described display panel corresponding with described non-viewing area of lighting is proofreaied and correct, and makes that the interior brightness of face is certain.
12. image display device as claimed in claim 1 is characterized in that:
Be provided with one or more light sources accordingly with each zone in described zone, this light source is light emitting diode (LED).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009019442A JP2010175913A (en) | 2009-01-30 | 2009-01-30 | Image display apparatus |
| JP2009-019442 | 2009-01-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101794542A true CN101794542A (en) | 2010-08-04 |
Family
ID=42153901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910225225A Pending CN101794542A (en) | 2009-01-30 | 2009-11-16 | Video display apparatus |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20100194791A1 (en) |
| EP (1) | EP2214154A3 (en) |
| JP (1) | JP2010175913A (en) |
| CN (1) | CN101794542A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950543A (en) * | 2010-09-08 | 2011-01-19 | 青岛海信电器股份有限公司 | Dynamic backlight adjustment method and device |
| CN102651204A (en) * | 2012-03-26 | 2012-08-29 | 京东方科技集团股份有限公司 | Method, device and system for displaying images through regional dimming |
| CN103021345A (en) * | 2012-12-18 | 2013-04-03 | 四川长虹电器股份有限公司 | Method for eliminating light leak of liquid crystal display |
| CN103971624A (en) * | 2013-01-28 | 2014-08-06 | 富泰华工业（深圳）有限公司 | Light-leaking detection system and method |
| US20140301658A1 (en) * | 2013-04-04 | 2014-10-09 | Nvidia Corporation | Per pixel mapping for image enhancement |
| CN105374323A (en) * | 2015-12-18 | 2016-03-02 | 深圳Tcl数字技术有限公司 | Dot matrix backlight source drive method, device and system |
| CN106157286A (en) * | 2015-04-03 | 2016-11-23 | 研祥智能科技股份有限公司 | Image processing method and screen light leak test method |
| TWI563491B (en) * | 2014-12-30 | 2016-12-21 | Jadard Technology Inc | Image process system and method |
| CN106611587A (en) * | 2014-08-28 | 2017-05-03 | 青岛海信电器股份有限公司 | Backlight source control method and device for entering or exiting wide-screen film display mode |
| US9830865B2 (en) | 2013-04-04 | 2017-11-28 | Nvidia Corporation | Regional histogramming for global approximation |
| US10019787B2 (en) | 2013-04-04 | 2018-07-10 | Nvidia Corporation | Regional dimming for power savings |
| TWI637384B (en) * | 2017-11-30 | 2018-10-01 | 奇景光電股份有限公司 | Display system and method for checking transmission quality by comparing calculation value of image data |
| US10965898B2 (en) | 2014-08-28 | 2021-03-30 | Hisense Visual Technology Co., Ltd. | Backlight source control method of display device, display device and storage medium |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5650422B2 (en) | 2010-03-24 | 2015-01-07 | ソニー株式会社 | Liquid crystal display |
| CN102859578B (en) * | 2010-04-23 | 2016-02-10 | Nec显示器解决方案株式会社 | Display device, display packing |
| JP5337757B2 (en) | 2010-04-28 | 2013-11-06 | 日立コンシューマエレクトロニクス株式会社 | Liquid crystal display device and backlight control method |
| JP2012123100A (en) * | 2010-12-07 | 2012-06-28 | Hitachi Consumer Electronics Co Ltd | Liquid crystal display device |
| US9142157B2 (en) * | 2011-01-20 | 2015-09-22 | Apple Inc. | Methods for enhancing longevity in electronic device displays |
| US8749473B2 (en) * | 2011-03-15 | 2014-06-10 | Sharp Kabushiki Kaisha | Video display device |
| JP5452666B2 (en) | 2011-08-04 | 2014-03-26 | シャープ株式会社 | Video display device |
| JP6033532B2 (en) * | 2011-08-19 | 2016-11-30 | 三菱電機株式会社 | Liquid crystal display |
| JP6045138B2 (en) * | 2011-11-29 | 2016-12-14 | キヤノン株式会社 | Image display apparatus and control method thereof |
| US8740061B2 (en) * | 2012-07-06 | 2014-06-03 | Hewlett-Packard Development Company, L.P. | Recording information for a web manufacturing process |
| JP6198512B2 (en) * | 2013-08-06 | 2017-09-20 | キヤノン株式会社 | Image display apparatus, control method therefor, and image display system |
| JP2015082022A (en) | 2013-10-22 | 2015-04-27 | 株式会社ジャパンディスプレイ | Display device, display device driving method, and electronic apparatus |
| CN104575406A (en) * | 2015-02-09 | 2015-04-29 | 京东方科技集团股份有限公司 | Method for driving backlight plate as well as time sequence controller and backlight driving plate |
| JP5990302B2 (en) * | 2015-05-07 | 2016-09-14 | キヤノン株式会社 | Display control apparatus and control method thereof |
| US10803828B2 (en) | 2017-02-24 | 2020-10-13 | Apple Inc. | Locally adaptive backlight control |
| US10692444B2 (en) * | 2018-09-24 | 2020-06-23 | Bose Corporation | Systems and methods for controlling operation of a backlight for a display panel |
| US20200202798A1 (en) * | 2018-12-24 | 2020-06-25 | Lincoln Technology Solutions, Inc. | Video Pipeline Pixel Analysis for Full Array Local Dimming |
| JP7460913B2 (en) * | 2021-02-26 | 2024-04-03 | 日亜化学工業株式会社 | Image display method and image display device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR930010487B1 (en) * | 1990-12-31 | 1993-10-25 | 삼성전자 주식회사 | Digital automatic white balance circuit |
| US5465118A (en) * | 1993-12-17 | 1995-11-07 | International Business Machines Corporation | Luminance transition coding method for software motion video compression/decompression |
| TW200739507A (en) * | 2006-03-23 | 2007-10-16 | Toshiba Matsushita Display Tec | Liquid crystal display device |
| JP2008052259A (en) * | 2006-07-26 | 2008-03-06 | Toshiba Matsushita Display Technology Co Ltd | Liquid crystal display device |
| JP2008176211A (en) * | 2007-01-22 | 2008-07-31 | Hitachi Ltd | Liquid crystal display device and method of controlling brightness thereof |
| JP2010532491A (en) * | 2007-07-04 | 2010-10-07 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Method and system for driving backlight of display |
-
2009
- 2009-01-30 JP JP2009019442A patent/JP2010175913A/en active Pending
- 2009-11-16 CN CN200910225225A patent/CN101794542A/en active Pending
- 2009-11-27 EP EP09252691A patent/EP2214154A3/en not_active Withdrawn
- 2009-12-02 US US12/629,210 patent/US20100194791A1/en not_active Abandoned
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950543B (en) * | 2010-09-08 | 2012-07-04 | 青岛海信电器股份有限公司 | Dynamic backlight adjustment method and device |
| CN101950543A (en) * | 2010-09-08 | 2011-01-19 | 青岛海信电器股份有限公司 | Dynamic backlight adjustment method and device |
| CN102651204A (en) * | 2012-03-26 | 2012-08-29 | 京东方科技集团股份有限公司 | Method, device and system for displaying images through regional dimming |
| WO2013143277A1 (en) * | 2012-03-26 | 2013-10-03 | 京东方科技集团股份有限公司 | Method, device and system for displaying images through regional dimming |
| CN103021345B (en) * | 2012-12-18 | 2014-12-24 | 四川长虹电器股份有限公司 | Method for eliminating light leak of liquid crystal display |
| CN103021345A (en) * | 2012-12-18 | 2013-04-03 | 四川长虹电器股份有限公司 | Method for eliminating light leak of liquid crystal display |
| CN103971624A (en) * | 2013-01-28 | 2014-08-06 | 富泰华工业（深圳）有限公司 | Light-leaking detection system and method |
| US20140301658A1 (en) * | 2013-04-04 | 2014-10-09 | Nvidia Corporation | Per pixel mapping for image enhancement |
| US10019787B2 (en) | 2013-04-04 | 2018-07-10 | Nvidia Corporation | Regional dimming for power savings |
| US9830865B2 (en) | 2013-04-04 | 2017-11-28 | Nvidia Corporation | Regional histogramming for global approximation |
| US9852497B2 (en) * | 2013-04-04 | 2017-12-26 | Nvidia Corporation | Per pixel mapping for image enhancement |
| US10965898B2 (en) | 2014-08-28 | 2021-03-30 | Hisense Visual Technology Co., Ltd. | Backlight source control method of display device, display device and storage medium |
| CN106611587A (en) * | 2014-08-28 | 2017-05-03 | 青岛海信电器股份有限公司 | Backlight source control method and device for entering or exiting wide-screen film display mode |
| TWI563491B (en) * | 2014-12-30 | 2016-12-21 | Jadard Technology Inc | Image process system and method |
| CN106157286A (en) * | 2015-04-03 | 2016-11-23 | 研祥智能科技股份有限公司 | Image processing method and screen light leak test method |
| CN106157286B (en) * | 2015-04-03 | 2020-11-17 | 研祥智能科技股份有限公司 | Image processing method and screen light leakage detection method |
| WO2017101273A1 (en) * | 2015-12-18 | 2017-06-22 | 深圳Tcl数字技术有限公司 | Lattice backlight source driving method, device and system |
| CN105374323B (en) * | 2015-12-18 | 2018-02-13 | 深圳Tcl数字技术有限公司 | Dot matrix backlight drive method, device and system |
| CN105374323A (en) * | 2015-12-18 | 2016-03-02 | 深圳Tcl数字技术有限公司 | Dot matrix backlight source drive method, device and system |
| TWI637384B (en) * | 2017-11-30 | 2018-10-01 | 奇景光電股份有限公司 | Display system and method for checking transmission quality by comparing calculation value of image data |
Also Published As
| Publication number | Publication date |
|---|---|
| US20100194791A1 (en) | 2010-08-05 |
| EP2214154A2 (en) | 2010-08-04 |
| JP2010175913A (en) | 2010-08-12 |
| EP2214154A3 (en) | 2011-02-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101794542A (en) | Video display apparatus | |
| CN100583214C (en) | LCD television set backlight control system and method | |
| CN101520988B (en) | Display device | |
| CN101324722B (en) | Method for adjusting liquid crystal display device backlight lightness and contrast | |
| KR101192779B1 (en) | Apparatus and method for driving of liquid crystal display device | |
| EP1705636B1 (en) | Display apparatus and display method | |
| CN103718235B (en) | Video display device | |
| KR101354333B1 (en) | Backlight dimming method and liquid crystal display using the same | |
| CN101364384B (en) | Method and apparatus for liquid crystal image processing | |
| US8421361B2 (en) | Backlight control circuit and method thereof | |
| EP2357636B1 (en) | Display apparatus and control circuit of the same | |
| JP2012123100A (en) | Liquid crystal display device | |
| US20070182700A1 (en) | Image display device and image display method | |
| EP2306445A1 (en) | Liquid crystal display device and backlight control method | |
| US8547407B2 (en) | Backlight control method and apparatus for high brightness contrast images | |
| CN101290754B (en) | Methods of LCD backlight dimming, LCD/image signal compensating and LCD display controlling | |
| EP1868178A2 (en) | Display apparatus and control method thereof | |
| WO2005040900A1 (en) | Display and control method thereof | |
| US20090109246A1 (en) | Display apparatus and control method thereof for saving power | |
| JP2010072281A (en) | Liquid crystal display device and video display method used therefor | |
| JP2008304907A (en) | Liquid crystal display, and image display method used therefor | |
| EP3975536A1 (en) | Image compensation apparatus and method | |
| US10490161B2 (en) | Projection device and luminance control method of frame thereof | |
| KR20150039468A (en) | Liquid crystal display device using the same and driving method thereof | |
| JP2009042650A (en) | Liquid crystal display device and image display method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100804 |